The mangroves in Hainan Dongzhai harbor mangrove national nature reserve suffered from degradation or even death due to the outbreak of Sphaeroma sp.Characteristics of degrading mangrove communities and soil properties were investigated to analyze the dynamic of the mangroves rapid degradation and death and variation of soil properties.Results showed that:(1) Mangrove degradation proceeded progressively from 2012 to 2014.Tree mortality increased and the number of live trees and canopy density decreased sign...